Atomic stucture

Question 1

Nucleon number?

Answer 1

Mass number, the total number of protons and neutrons in the nucleus of an atom.

Question 2

Isotopes?

Answer 2

Atoms of the same element which have the same proton number BUT DIFFERENT nucleon numbers (mass numbers).

Question 3

Relative charge of proton?

Answer 3

+1

Question 4

Relative charge of neutron?

Answer 4

Neutral

Question 5

Relative charge of electron?

Answer 5

-1

Question 6

Relative mass of proton?

Answer 6

1

Question 7

Relative mass of neutron?

Answer 7

1

Question 8

Relative mass of electron?

Answer 8

1
____

1836

Question 9

Valent electrons?

Answer 9

Outer shell electrons

Question 10

Transition metals?

Answer 10

Are elements that don’t have group numbers.

Question 11

Metals are on..

Answer 11

…The left side of the staircase.

Question 12

NON-metals are on…

Answer 12

…The right side of the staircase

Question 13

Group 1 elements are…

Answer 13

…alkali metals

Question 14

Group 7 elements are…

Answer 14

Halogens

Question 15

Group 8 OR 0 elements are…

Answer 15

Noble gases

Question 16

Semi metals (metalloids) are…

Answer 16

The elements on the staircase:

• B, Boron
• Si, Silicon
• Ge, Germanium
• As, Arsenic
• Te, Tellurium
• Sb, Antimony

Question 17

What is the valency of and element?

Answer 17

The valency of an element is the number if electrons the atoms gains, looses or shares when it forms a compound to obtain a full outer shell.

Question 18

Group 1-3 need to _________ electrons to obtain a full outer shell.

Answer 18

subtract

Question 19

Group 5-7 need to __________ electrons to obtain a full outer shell.

Answer 19

add

Group 8 OR 0 do not need to either subtract or loose electrons because they already have full outer shells.

Question 20

Elements in same period (row) have the same number of _________

Answer 20

shells

Question 21

Elements in the same group have the same number of ______________

Answer 21

_outer shell electrons _

Question 22

Metallic character…

Answer 22

Increases down a group, HOWEVER, it’s decreases across a period

Question 23

The two types of isotopes are…

Answer 23

Radioactive and non-radioactive.

Radioactive isotopes ( radioisotopes ) undergo radioactive decay.

Question 24

Radioactive isotopes uses in medicine and industry

Answer 24

Medicine

• Used for killing cancer cells
• Used for locating tumours
• Used for treatment of overactive thyroid glands

Industry

• Used for smoke detectors
• Used to check for leaks in oil and gas pipelines

Question 25

Which radioisotope is used in nuclear power stations to generate electricity?

Answer 25

Uranium, U

235

Question 26

Proton number?

Answer 26

Atomic number, the number of protons in the nucleus of an atom

Question 27

Diffusion

Answer 27

Particles in liquids and gases can move randomly. When the particles collide, they bounce off each other in different directions. This results in particles getting mixed up and spreading out in the space available.